Also, there is the 68k cross-compiling port of gcc (TIGCC, tigcc.org) that lets you write programs in C for the 68k-based calculators. And I have to say that I

Also, there is the 68k cross-compiling port of gcc (TIGCC, tigcc.org) that lets you write programs in C for the 68k-based calculators. And I have to say that I find the TI system API easier to deal with than its HP equivalent.